What Is a 4+1 Axis CNC Press Brake? A 4+1 axis electro-hydraulic synchronous CNC press brake is a high-precision bending machine that controls ram position, backgauge position, and crowning compensation across five axes. The 4+1 designation means four main axes (Y1, Y2, X, R) plus one crowning axis (the +1). This configuration delivers consistent bend angles and flange lengths across the full bending length, which is essential for precision sheet metal parts that require